问题
选择题
People who eat a balanced diet should be healthier than those who only eat biscuits and hamburgers, ______?
A．don’t they
B．do they
C．shouldn’t they
D．should they
答案
答案：C
题目分析：句意：吃平衡饮食的人应该比那些只吃饼干和汉堡包更健康。分析：who eat a balanced diet 吃平衡饮食的人。为定语成份，句中真正的助动词是should,因此进行反意疑问句时要用其否定形式，故选C